Flow-electrode capacitive deionization (FCDI) scale-up using a membrane stack configuration

Ma, Jinxing; Ma, Jixin; Zhang, Changyong; Song, Jingke; Dong, Wenjia; Waite, T. David

doi:10.1016/j.watres.2019.115186

Cited by 101 publications

(49 citation statements)

References 43 publications

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“…In this case, the absolute pumping energy for the flow electrodes will stay the same, while the amount of product stream is multiplied by the number of cell pairs. Based on these estimations, the use of multiple cell pairs seems to be a promising approach for FCDI processes, which is in agreement with the observations presented by Ma et al [31]) regarding a comparable FCDI stack, which is operable in a semi-continuous manner. In the following, the concept of single-module FCDI with multiple cell pairs is implemented, tested, and its performance evaluated.…”

Section: Concept: Fcdi With Multiple Cell Pairssupporting

confidence: 90%

“…Additionally, it is shown that a significant reduction of the energy demand and an improved productivity can be achieved by using several cell pairs. This approach is similar to the approach recently presented by Ma et al [31], who presented an FCDI configuration with stacked membranes, which leads to significant productivity improvements, but only enables a semi-continuous water treatment. In our work, we demonstrate the continuous treatment of saline brine using FCDI modules with one or more cell pairs, and therefore an even number of water compartments.…”

Section: Significant Attention Has Been Focused On Capacitive Deionizmentioning

confidence: 74%

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Flow-electrode capacitive deionization enables continuous and energy-efficient brine concentration

et al. 2020

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Section: Concept: Fcdi With Multiple Cell Pairssupporting

confidence: 90%

Section: Significant Attention Has Been Focused On Capacitive Deionizmentioning

confidence: 74%

Flow-electrode capacitive deionization enables continuous and energy-efficient brine concentration

et al. 2020

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“…In another study, AEM-electrode assembly was found to reduce potential drop and provide a more homogeneous electric field [ 201 ]. Ma et al [ 202 ] investigated the stacking of multiple membrane pairs in a FCDI cell and demonstrated the feasibility of semi-continuous operation with two membrane pairs. However, hurdles regarding scale-up considerations are still high, especially the possibility of water transfer through the IEMs.…”

Section: Recent Technological Developments Based On Ed Membrane Phmentioning

confidence: 99%

Electrodialytic Processes: Market Overview, Membrane Phenomena, Recent Developments and Sustainable Strategies

Bazinet

Geoffroy

2020

Membranes

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In the context of preserving and improving human health, electrodialytic processes are very promising perspectives. Indeed, they allow the treatment of water, preservation of food products, production of bioactive compounds, extraction of organic acids, and recovery of energy from natural and wastewaters without major environmental impact. Hence, the aim of the present review is to give a global portrait of the most recent developments in electrodialytic membrane phenomena and their uses in sustainable strategies. It has appeared that new knowledge on pulsed electric fields, electroconvective vortices, overlimiting conditions and reversal modes as well as recent demonstrations of their applications are currently boosting the interest for electrodialytic processes. However, the hurdles are still high when dealing with scale-ups and real-life conditions. Furthermore, looking at the recent research trends, potable water and wastewater treatment as well as the production of value-added bioactive products in a circular economy will probably be the main applications to be developed and improved. All these processes, taking into account their principles and specificities, can be used for specific eco-efficient applications. However, to prove the sustainability of such process strategies, more life cycle assessments will be necessary to convince people of the merits of coupling these technologies.

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“…[21] This work also leads to hybrids between FCDI and ED configurations. [22] In this paper, we are taking an important step forward by introducing a membrane electrode assembly (MEA) to FCDI which uses low-cost, flexible and chemically stable carbon fiber fabric to conduct the electric charge and reinforce the ion-exchange membranes at the same time.…”

Section: Introductionmentioning

confidence: 99%

Membrane-electrode assemblies for flow-electrode capacitive deionization

Linnartz

Rommerskirchen

Walker

et al. 2020

Journal of Membrane Science

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Scale up of flow-electrode capacitive deionization is hindered due to the reliance on thick brittle graphite current collectors. Inspired by developments of electrochemical technologies we present the use of felxible membrane electrode assemblies (MEA) to solve these limitations. We tested different carbon-fiber fabrics as current collectors and laminated them successfully with ion-exchange membranes. The use of thinner ion-exchange membranes is now possible due to the reinforcement with the carbon fiber fabric. Desalination experiments reveal that a MEA setup can achieve salt transfer rates equal to standard setups. Hence we deduce that charge percolation also acts outside the electric field. In a single point of contact, ionic and electric charges are exchanged at the carbon surface of the MEA. The use of thinner membranes leads to a reduced potential drop. Together with a more homogenous electric field across the feed water section, this can compensate for the reduction of contact surface between flow electrode and current collector.

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Flow-electrode capacitive deionization (FCDI) scale-up using a membrane stack configuration

Cited by 101 publications

References 43 publications

Flow-electrode capacitive deionization enables continuous and energy-efficient brine concentration

Flow-electrode capacitive deionization enables continuous and energy-efficient brine concentration

Electrodialytic Processes: Market Overview, Membrane Phenomena, Recent Developments and Sustainable Strategies

Membrane-electrode assemblies for flow-electrode capacitive deionization

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